WorksheetsHeart Excitation & Cardiac Cycle
Total questions: 15
Worksheet time: 8mins
#1 is pointing to the:
SA node
AV node
AV bundle
Purkinje fibers
#2 is pointing to the:
SA node
AV node
AV bundle branches
Purkinje fibers
#6 is pointing to the:
SA node
AV node
AV bundle
AV bundle branches
#3 is pointing to the:
AV node
AV bundle
AV bundle branches
Purkinje fibers
#7 is pointing to the:
AV node
AV bundle
AV bundle branches
Purkinje fibers
What is happening during the P wave?
Atrial repolarization (atrial diastole)
Atrial depolarization (atrial systole)
Ventricular repolarization (ventricular diastole)
Ventricular depolarization (ventricular systole)
What is happening during the QRS complex?
Atrial repolarization (atrial diastole)
Atrial depolarization (atrial systole)
Ventricular repolarization (ventricular diastole)
Ventricular depolarization (ventricular systole)
What is happening during the T wave?
Semilunar valves close
Atria are in systole
Ventricles are in diastole
Ventricles are in systole
When do the AV valves close?
P wave
PR segment
ST segment
T wave
What causes valves to open during the cardiac cycle?
They open to let air through
Changes in pressure in the atria, ventricles, pulmonary artery, and aorta
They open to let blood flow back and forth between chambers
When the pressure drops suddenly
What is another name for the "pacemaker" of the heart?
SA node
AV node
AV bundle
Purkinje fibers
In what part of the conduction system is there a temporary delay?
SA node
AV node
AV bundle
AV bundle branches
What part of the conduction system causes the ventricles to contract?
AV node
AV bundle
AV bundle branches
Purkinje fibers
The right side of the heart is called __________ circuit; the left side of the heart is called the __________ circuit.
Lungs; Systemic
Systemic; Pulmonary
Pulmonary; Systemic
Pulmonary; Aortic
Why is the left ventricular wall so much thicker than the right ventricular wall?
Blood from the right side is being pushed so much farther
Blood from the left side is not being pushed as far
It's not, it's the same thickness
Blood from the left side is being pushed so much farther
